Research Article
Searchlight CT: A new reconstruction method for collimated X-ray tomography
@INPROCEEDINGS{10.4108/icst.valuetools.2011.245816, author={Robert Azencott and Anando Sen and Bernhard G. Bodmann and King C. Li and Demetrio Labate and Xiaobo Zhou}, title={Searchlight CT: A new reconstruction method for collimated X-ray tomography}, proceedings={1st International ICST Workshop on New Computational Methods for Inverse Problems}, publisher={ACM}, proceedings_a={NCMIP}, year={2012}, month={6}, keywords={ACM proceedings X-ray Transform Radon Transform Tomography Local Reconstruction}, doi={10.4108/icst.valuetools.2011.245816} }- Robert Azencott
Anando Sen
Bernhard G. Bodmann
King C. Li
Demetrio Labate
Xiaobo Zhou
Year: 2012
Searchlight CT: A new reconstruction method for collimated X-ray tomography
NCMIP
ICST
DOI: 10.4108/icst.valuetools.2011.245816
Abstract
The method presented in this paper aims to reduce the overall radiation exposure from X-ray CT scans when only the reconstruction of a region of interest is required. To achieve this goal, the Searchlight CT algorithm restricts the acquisition to X-rays passing mainly through the region of interest. The algorithm uses an iteration of the X-ray transform and of a regularized inverse, which converges rapidly and for which generic conditions of converges are provided. The performance of the Searchlight CT algorithm is illustrated on both phantom and experimental data.
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